Recently my knock-on hasn't been working and I have a couple of dead spots. Att is sending me a replacement phone under warranty. Several months ago though I dropped my phone in water for like 2 seconds. There was no issues, and it never even lost power during or after the water. My question is would att find the water indicator has turned even though its not the cause of my issues? I don't want to break open the back since that would void my warranty.